https://www.amazon.com/Drapers-Strength-Powerlifting-Stretch-41-inch/dp/B00T360YD0/ref=mp_s_a_1_3?dchild=1&keywords=draper%2Bstrength%2Bresistance%2Bbands%2Bset&qid=1594614594&sprefix=draper%2Bstre&sr=8-3&th=1&psc=1

These guys sent me a free new black band because the one they sent me popped in the first week of use. I’m in no way at all affiliated with them, but they’re fantastic.